package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.impl.CategoryServiceImpl;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpSession;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Slf4j
@RestController
@RequestMapping("/dish")
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;

    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());

        dishService.saveWithFlavor(dishDto);
        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);
        return R.success("新增菜品成功");
    }

    /**
     * 菜品信息分页查询
     *
     * @param page     当前查询页码
     * @param pageSize 每页展示记录数
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        log.info("page = {},pageSize = {},name = {}", page, pageSize, name);
        //构造分页构造器
        Page<Dish> pageInfo = new Page<>(page, pageSize);

        //构造条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null, Dish::getName, name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);
        //执行查询
        dishService.page(pageInfo, queryWrapper);

        //分析：上述查询的分页对象中，List<Dish>数据中，每一个Dish对象，没有分页名称
        //2.创建新的分页对象
        Page<DishDto> dishDtoPage = new Page<>();//无需查询数据库，不需要添加分页参数
        //3.对象拷贝
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");
        //4.获取分页查询的集合数据
        List<Dish> records = pageInfo.getRecords();
        List<DishDto> dtoList = new ArrayList<>();
        //5.遍历集合
        for (Dish record : records) {
            //5.1将Dish拷贝到DishDto
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(record, dishDto);
            //5.2查询每一个菜品所属分类名称
            Long categoryId = record.getCategoryId();
            Category category = categoryService.getById(categoryId);
            String name1 = category.getName();
            dishDto.setCategoryName(name1);
            //5.3防区集合中
            dtoList.add(dishDto);
        }
        //6。将dtoList集合，添加到dishDtoPage分页对象中
        dishDtoPage.setRecords(dtoList);

        //7.返回分页对象数据
        return R.success(dishDtoPage);
    }

    /*
     * 根据id查询菜品和对应口味信息
     * */
    @GetMapping("/{id}")
    public R<DishDto> getById(@PathVariable Long id) {

        DishDto byIdWithFlavor = dishService.getByIdWithFlavor(id);

        return R.success(byIdWithFlavor);
    }


    /*
     * 状态更新
     * */
    @PostMapping("/status/{status}")
    public R<String> updateStatus(@PathVariable Integer status, @RequestParam List<Long> ids) {
        log.info(ids.toString());


       /* for (Long id : ids) {
            Dish dish = dishService.getById(id);
            dish.setStatus(status);
            dishService.updateById(dish);
        }*/
        LambdaUpdateWrapper<Dish> lq  = new LambdaUpdateWrapper();
        lq.in(Dish::getId,ids);
        lq.set(Dish::getStatus,status);
        dishService.update(lq);

        return R.success("修改成功");
    }

    /*
     * 删除菜品
     * */
    @DeleteMapping
    public R<String> delete(@RequestParam List<Long> ids) {
        log.info("删除分类，id为：{}", ids);
        //categoryService.removeById(id);
        dishService.remove(ids);
        return R.success("分类信息删除成功");

    }

    /*
     * 修改菜品
     * */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());
        dishService.updateWithFlavor(dishDto);
        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);
        return R.success("修改菜品成功");
    }


    /*
     * 根据id查询菜品和对应口味信息
     * *//*
    @GetMapping("/list")
    public R<List<Dish>> list(Dish dish) {
        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null,Dish::getCategoryId,dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus,1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        return R.success(list);
    }*/

    /*
     * 根据id查询菜品和对应口味信息
     * */
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish) {
        List<DishDto> dishDtoList = null;
//动态构造key
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();//dish_1397844391040167938_1
//先从redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
        if(dishDtoList != null){
            //如果存在，直接返回，无需查询数据库
            return R.success(dishDtoList);
        }

        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null,Dish::getCategoryId,dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus,1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(queryWrapper);

        List<DishDto> dtoList = new ArrayList<>();

        dtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();

            Category category = categoryService.getById(categoryId);
            if (category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);

            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);

            dishDto.setFlavors(dishFlavorList);
            return dishDto;
        }).collect(Collectors.toList());

        //如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
        redisTemplate.opsForValue().set(key,dtoList,60, TimeUnit.MINUTES);
        return R.success(dtoList);
    }
}
